etmTk is an event and task manager. In contrast to most calendar/todo applications, creating items (events, tasks, and so forth) in etm does not require filling out fields in a form. Instead, items are created as free-form text entries using a simple, intuitive format and stored in plain text files. Both a graphical user interface based on Tkinter and a command line interface are provided.

Scrumix is project and task management application. Its main purpose is to try to make things a little bit easier to handle and organize with as much simplicity as possible. Its features include a taskboard, project areas, integrated TiddlyWiki, and file browsing.

todoyu is a powerful project and task management system. The core features are project handling, time tracking, time sheets, resource management, calendar, customizable reporting, keeping track of communication and decisions, invoicing directly from tracked time, and address management of customers and employees. It improves billing accuracy and timeliness, and removes risk from the billing process. A todoyu customer's clients get visibility into the project work done on their behalf. The system is extensible with additional modules. The system is completely Web based and translated in 12 languages.

ProjectForge is a Web-based solution for project management including time sheet booking, Gantt charts, financial administration and controlling, issue management, and managing work-break-down structures. First-party and third-party plugins are supported. Ready-to-run packages of the ProjectForge server are available for Windows, Mac OS X, and all Java6-capable platforms (database and Web server are included). ProjectForge is also available as a web-archive file (war) for usage within your own Web server and for your own database installation.

taskrambler is a HTTP server that is intended to eventually be used as the user interface provider for a multi-user task management system inspired by taskwarrior. It delivers static assets to Web browsers and some dynamic interaction.

HiveMind Project Manager is a project management application featuring request tracking, and wiki-based content management. It supports multiple vendors, multiple clients, flexible billing rates, time recording, expenses, client and vendor/worker invoicing, payments, and general ledger. In addition to specific find screens for everything, there is a single screen with general text and parametric search across projects, tasks, requests, and wiki pages. Based on Moqui Framework and Mantle Business Artifacts, HiveMind has a solid business foundation and is well suited to complex customization.

evolution-kolab is a plugin for the Evolution PIM suite to connect to a Kolab groupware server. It lets you use Evolution as a client for Kolab and share appointments, contacts, email messages, and more with other members of your Kolab site.

headstak is a stack-based task list. Before you start a task, or when you are interrupted while working on a task, you push the current job onto a stack. When the interruption finishes, or when the task is complete, you pop it from the stack - leaving you facing the job you were working on beforehand at the top of the stack. Run it and it should appear on your status bar as a little stack of stuff on a head. It is activated with the Control-Command-0 global hotkey.

Wyrd is a curses front-end for Remind, a powerful
calendar and alarm application. The display
features a scrollable time table suitable for
visualizing your schedule at a glance. Wyrd
integrates with an external editor of your choice
to make editing of reminder files more efficient,
and provides hotkeys to quickly access the most
common Remind options. Other features include
extensive configurability, Mutt-like interface
design, and minimal resource requirements.